python AttributeError: module 'keras.backend' has no attribute 'eager'

前提・実現したいこと

from keras import layers, models2　でエラーが出ました

発生している問題・エラーメッセージ

Traceback (most recent call last):
  File "c:省略.py", line 3, in <module>
    from keras import layers, models2
  File "C:\Users\mori-soh\Anaconda3\envs\py36\lib\site-packages\keras\models2.py", line 
10, in <module>
    from .engine.input_layer2 import Input
  File "C:\Users\mori-soh\Anaconda3\envs\py36\lib\site-packages\keras\engine\input_layer2.py", line 7, in <module>
    from .base_layer2 import Layer
  File "C:\Users\mori-soh\Anaconda3\envs\py36\lib\site-packages\keras\engine\base_layer2.py", line 12, in <module>
    from .. import initializers2
  File "C:\Users\mori-soh\Anaconda3\envs\py36\lib\site-packages\keras\initializers2.py", line 281, in <module>
    class Identity(Initializer):
  File "C:\Users\mori-soh\Anaconda3\envs\py36\lib\site-packages\keras\initializers2.py", line 295, in Identity
    @K.eager
AttributeError: module 'keras.backend' has no attribute 'eager'

該当のソースコード

python
1from keras import layers, models2

試したこと

c:省略/keras/backend/__init__3.pyにはfrom .load_backend import eagerがあります
__init__やmodelsに数字がついてる理由は、標準モジュールと被ってしまうのを防ぐために名前を変更しています。

補足情報（FW/ツールのバージョンなど）

anaconda 4.4.0
python 3.6.12
win10

packages in environment at C:\Users\mori-soh\Anaconda3\envs\py36:
_tflow_select 2.1.0 gpu
absl-py 0.11.0 pyhd3eb1b0_1
aiohttp 3.6.3 py36he774522_0
astor 0.8.1 py36_0
async-timeout 3.0.1 py36_0
attrs 20.3.0 pyhd3eb1b0_0
blas 1.0 mkl
blinker 1.4 py36_0
brotlipy 0.7.0 py36h2bbff1b_1003
ca-certificates 2020.12.8 haa95532_0
cachetools 4.2.0 pyhd3eb1b0_0
certifi 2020.12.5 py36haa95532_0
cffi 1.14.4 py36hcd4344a_0
chainer 6.3.0 py_0
chardet 3.0.4 py36haa95532_1003
click 7.1.2 py_0
cryptography 3.3.1 py36hcd4344a_0
cudatoolkit 10.1.243 h74a9793_0
cudnn 7.6.5 cuda10.1_0
filelock 3.0.12 py_0
freetype 2.10.4 hd328e21_0
gast 0.2.2 py36_0
google-auth 1.24.0 pyhd3eb1b0_0
google-auth-oauthlib 0.4.2 pyhd3eb1b0_2
google-pasta 0.2.0 py_0
grpcio 1.31.0 py36he7da953_0
h5py 2.10.0 py36h5e291fa_0
hdf5 1.10.4 h7ebc959_0
icc_rt 2019.0.0 h0cc432a_1
idna 2.10 py_0
idna_ssl 1.1.0 py36_0
importlib-metadata 2.0.0 py_1
intel-openmp 2020.2 254
jpeg 9b hb83a4c4_2
keras 2.3.1 0
keras-applications 1.0.8 py_1
keras-base 2.3.1 py36_0
keras-preprocessing 1.1.0 py_1
libpng 1.6.37 h2a8f88b_0
libprotobuf 3.13.0.1 h200bbdf_0
libtiff 4.1.0 h56a325e_1
lz4-c 1.9.2 hf4a77e7_3
markdown 3.3.3 py36haa95532_0
mkl 2020.2 256
mkl-service 2.3.0 py36h196d8e1_0
mkl_fft 1.2.0 py36h45dec08_0
mkl_random 1.1.1 py36h47e9c7a_0
multidict 4.7.6 py36he774522_1
numpy 1.19.2 py36hadc3359_0
numpy-base 1.19.2 py36ha3acd2a_0
oauthlib 3.1.0 py_0
olefile 0.46 py_0
openssl 1.1.1i h2bbff1b_0
opt_einsum 3.1.0 py_0
pillow 8.0.1 py36h4fa10fc_0
pip 20.3.3 py36haa95532_0
protobuf 3.13.0.1 py36ha925a31_1
pyasn1 0.4.8 py_0
pyasn1-modules 0.2.8 py_0
pycparser 2.20 py_2
pyjwt 1.7.1 py36_0
pyopenssl 20.0.1 pyhd3eb1b0_1
pyreadline 2.1 py36_1
pysocks 1.7.1 py36haa95532_0
python 3.6.12 h5500b2f_2
python_abi 3.6 1_cp36m conda-forge
pyyaml 5.3.1 py36he774522_1
requests 2.25.1 pyhd3eb1b0_0
requests-oauthlib 1.3.0 py_0
rsa 4.6 py_0
scipy 1.5.2 py36h9439919_0
setuptools 51.0.0 py36haa95532_2
six 1.15.0 py36haa95532_0
sqlite 3.33.0 h2a8f88b_0
tensorboard 2.3.0 pyh4dce500_0
tensorboard-plugin-wit 1.6.0 py_0
tensorflow 2.1.0 gpu_py36h3346743_0
tensorflow-base 2.1.0 gpu_py36h55f5790_0
tensorflow-estimator 2.1.0 pyhd54b08b_0
termcolor 1.1.0 py36_1
tk 8.6.10 he774522_0
typing 3.7.4.3 py36_0
typing_extensions 3.7.4.3 py_0
urllib3 1.26.2 pyhd3eb1b0_0
vc 14.2 h21ff451_1
vs2015_runtime 14.27.29016 h5e58377_2
werkzeug 0.16.1 py_0
wheel 0.36.2 pyhd3eb1b0_0
win_inet_pton 1.1.0 py36haa95532_0
wincertstore 0.2 py36h7fe50ca_0
wrapt 1.12.1 py36he774522_1
xz 5.2.5 h62dcd97_0
yaml 0.2.5 he774522_0
yarl 1.6.3 py36h2bbff1b_0
zipp 3.4.0 pyhd3eb1b0_0
zlib 1.2.11 h62dcd97_4
zstd 1.4.5 h04227a9_0